Using Channel 1 And Channel 2 Input Conditioning Keys; Overview Of Trigger/Sensitivity Menu - HP 53131A Operating Manual

CHANNEL 1
Trigger
Sensitivity
50
1M
!
DC
Damage Lvl:
AC
5V rms MAX. 50
X10
100kHz
Attenuate Filter
NOTE
Chapter 2 Operating Your Universal Counter

Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys

Using CHANNEL 1 and CHANNEL 2 Input
Conditioning Keys
The Trigger/Sensitivity keys are menu keys, while the other keys in this
group (that is, 50 /1 M , DC/AC, X10 Attenuate, and 100 kHz Filter)
are toggle keys.
Use the CHANNEL 1 and CHANNEL 2 group of keys (which are
identical) to set up the Counter's input conditions for measuring input
signals applied to channels 1 and 2. Each channel can be set up
independently. (The Trigger/Sensitivity menu is unavailable for Voltage
Peaks measurements.)

Overview of Trigger/Sensitivity Menu

Many of the measurement functions (that is, frequency, period, etc.)
automatically set the auto trigger mode and trigger level.
The Trigger/Sensitivity menu items allow you to override the automatic
settings.
The menu items under the Trigger/Sensitivity keys allow you to manually:
• select the auto trigger mode (AUTO TRIG: ON or OFF).
If auto trigger is OFF, you are allowed to:
• select the voltage level at which the corresponding input channel will
trigger (LEVEL: n V, where n is a numeric value).
If auto trigger is ON, you are allowed to:
• select the percentage of an input signal at which the Counter will
trigger (LEVEL: n PCT, where n is a numeric value).
Setting AUTO TRIG: to ON causes the Counter to measure and compute a
trigger level corresponding to the auto-trigger percentage of the selected
channel.
2-44 Operating Guide